peters



@niiet taies identit @frn WILLIAM W. TRAPP, OF HARTFORD, CONNECTICUT, ASSIGNOR TO TOBIAS KOEN, OFTHE SAME PLACE..

Letters Patent No. 82,661,'dated September 29, 1868.

IMPROVEMENT IN POLISHING THREAD.

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TO ALL WHOM VIT MAY CONCERN:

Be it known that I, WILLIAM W. TRAPP, of Hartford, in the State of Connecticut, have invented certain new and useful Improvements in Machinery for Polishing Silk, Worsted, and other Threads; and I do hereby declare that the following is a full, clear, and exact descriptiouthereof, reference being had to the accompanying drawings, making part of this specication, in which- Figure 1 is a front elevation of a machine, on the plan of my saiddmprovements, and

Figures 2 and 8, vertical sections, taken in the planes of theliues A a and B b.

The same letters indicate like parts in all the gures. v

My said invention relates to improvements in machinery for polishing silk, worsted, and other threads, by the well-known rubbing process. l

Generally the threads to be polished are delicate and easily. broken, and in machinery heretofore used for this purpose, as the threads travel from the twisting-iiers to the reels, they are subjected to the action of rubbers mountedin a reciprocating carriage, the friction of which, acting, as they all do, alternately in opposite directions, subjects the threads to so much strain that they frequently break, and when any one thread breaks, thewhole machine must be stopped until that thread is mended. And, 'besides this, the reciprocating. motion of the rubber-carriage, if run at a velocity required by economy, causes much jarring, which also tends to break the thread. I

The object of my said invention is to avoid the defects of machinery heretofore used for that purpose, and the nature of my said improvements will be ascertained from the following description.

In the accompanying drawingsv,

a represents a suitable frame, and 6.a horizontal driving-shaft, with a series of drums for driving the twisting-fliers c, by means of bands, 0Z,in the usual way. A v

The threads, e, to be poiished, are on spools or,bobbins, f, ou the spindles of the twistingiers.

lhe said threads pass upward from the liers-over a guide-rod, g, then down through guides, h and z', the series of guides h, if desired, being in a vat,j, of mace'ratingV-liquid,l and from the guides z' they pass through guides, k, just below the reels Z, on which they are wound, the said reels being driven by bandsfm, from pulleys on a shaft, n, which receives motion by a hand,`o, from a pulley on the driving-shaft b. I

As the twisting-threads pass from 'the guides z' to the upper guides c, each onel is acted upon by two sets of' rubbers or polishers, p and g, .mounted in carriages, r and s, that slide in vertical ways, t t. 'The said rubbers are represented in' the accompanying drawings as cylindrical rods, three to each carriage,'but the numberlmay Jbe' changed, and they may be made according to any of the modes heretofore uhed,fas this makes no part of" my invention. Two series of such rubber-carriages, and two corresponding series of iiers and reels, are mounted on opposite lsides of the frame, with a space between the two series of ways, tt, in which two cross-heads, u u', one above the other, slide invertical ways, o o. To each end of these cross-heads, are attached rods, w w w fw', which extend down, and at their lower ends they have horizontal slots, a; a: :v x', formed iu them, in which four cranks, y yg y', 'on the driving-shaftb, play, two being on one side and thev other two on the opposite side of the axis of the shaft. By this means, the two cross-heads are moved up and down, thc one descending as the -other ascends', and vice versa.

The cross-heads u uf, on each side, are provided each with as manyprojecting spurs, z, as there are rubbercarriages in each series on each side, which spurs engage notches in spriug-dogs, a', hinged to the inner face o f the carriages, und, when so engaged, each of the cross-heads imparts a vertical reciprocating motion to one series of rubber-carriages on each side of the frame, and in this way the two'series on each side are moved in opposite directions.

When anyone thread breaks, instead ot' stoppingv the whole frame, the two rubber-carriages that act onv that thread can be disconnected from the cross-heads whilst the others continue torun, and when the broken thread has been mended, they can be reconnected, and this is effected by means of a small hand-lever, b', hinged to one of each pa-ir ot' ways t. This hand-lever is formed with a stop-plate, c', which, when moved inwards, is brought in the track'of the two rubbercarriages, as they approach each other.

The spring-dogs d', on the carriages, are bevelled each from its notch to its outer end, so that as the carriages approach each other thc bevelled ends of the spring-dogs are brought in contact with the edges of the plate c, by which they are forced back and liberated fromthe spurs e on the cross-heads. The two rubbercarriages being thus disconnected and stopped, the broken thread can be mended whilst the other parts of the machine continue to run, and, when mended, and the stop-plate @"movcd away from the dogs bythe hand-lever b', so soon as the cross-heads approach each other, the spurs z enter the notches of the spring-dogs, and reconnect the two carriages. i

The carriages 1' and .s are both disconnected and connected at the same moment, and when they are nearest together in the middle of the Vertical ways t t, and the cranks y y are at the end of their throw, and the rods w and w on the centre, so that, in starting again, the motion is gradually increasing as the crank continues to turn, and starts Without anyjerk, as would be the case if the crank were in any other position.

The advantages resulting from my said improvements are- First, that by reason of having one pair of rubber-carriages for each thread, instea'd of one pair for a series of threads, as heretofore, the machine continues in operation on all threads that are notbrokcn, the operation being suspended only on the thread or threads that happen to be broken, whilst in all other machines before known for this purpose, the operation of the entire machine must be suspended when any one thread breaks. n

Second, that by reason of having two rubber-carriages acting upon any one thread or series of threads, and moving in opposite directions, instead of one, only half the number of rubbers is required in each carriage to give the same effect, and the strain caused by the rubbers on the thread is but half as great as when they are all in one carriage, and act in the same direction, as the strain is divided between them, one half balancing the other half. The strain upon the thread outside of the space between the carriages is also rendered uniform, instead of its being pulled alternately back and forth, with a variable strain upon the reel and ier.

Third, that` by arranging the machine with corresponding sets of rubber-carriages on opposite sides, and making those on the same side move up and down in opposite directions at the same time, the reciprocating parts are balanced, and'thejar usually experienced is avoided.

From thc foregoing, vit will be obvious that some of my said improvements may be availed of without' the others, As, for instancefhaving the rubber-carriages separate for each thread, instead of one for a series of threads, may be used to advantage without the other improvements; and so with thense of the rubbercarriages, moving simultaneously in opposite directions. aThe advantages of this improvement can be availedA of, if so constructed that the two carriages shall operate on all of a series of threads; and so with the balancing of the reciprocating parts, to avoid the jars which cause the breaking of the threads.

What I claim as my invention, and desire to secure by Letters Patent, is- 1. The combination of 'two rubber-carriages, acting in opposite directions on any one or more threads, substantially as described, with one or more iers and reels, as and for the purpose described.

2. lThe devices a', c', z, or their equivalents, for stopping and starting 'the pair of rubber-carriages, working in oppositel directions upon one thread, so that they are stopped and started at the end ofl the throw of thecrank, substantially as described. l

3. The machine, constructed-and arranged substantially as described, having sets or series of rubbercarriages on `opposite sides of the driviug-shaft,whieh move up and down together, those on the same side having a motion in opposite directions, thereby balancing the reciprocating motions of the several parts, and causing the least possible jar in the machine.

I 4. The two rubber-carriages, acting ytogether upon one or more threads, and havinga reciprocating motion in opposite directions, to divide and balance the strain upon the thread, substantially'as described.

WM. W. TRAPP.

Witnesses:

JOHN T. PETERS. ELrsHA JOHNSON. 

